Hi @tsundf ! Thanks for bringing this one up.
We dug in here a bit just now and it looks like there is a bit of logic in place that was put in to handle existing anime extras - but we never documented that this logic is in place! We are going to make another pass here and see if that logic is really worth it (and would update the documentation) or if we should remove that special case (which is what I would guess you would vote for 
). Thanks for bringing this one up!
